* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

header, nav, footer, .content, .sidebar {
    border: 1px solid gray;
    text-align: center;
    line-height: 100%;
}

header, footer {
    height: 150px;
    background-color: <%= themeColor %>;
}
nav {
    height: 50px;
}
.wrapper {
    height: 500px;
    display: flex;
    width: 100%;
}
.sidebar {
    flex: 1
}
.content {
    flex: 3
}
